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Updated: May 1, 2026

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An "intelligent -responsive" bactericidal system based on OSA-starch Pickering emulsion.

Rui Wang1, Lishan Yao1, Shurui Peng1

  • 1School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.

International Journal of Biological Macromolecules
|February 25, 2023
PubMed
Summary

This study developed a stable Pickering emulsion using OSA-starch to deliver thymol, enhancing its effectiveness against foodborne pathogens like E. coli and S. aureus by preventing thymol

Keywords:
Intelligent releasedOSA-starch Pickering emulsionThymolTimely bactericidal effect

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Area of Science:

  • Food Science
  • Materials Science
  • Microbiology

Background:

  • Foodborne pathogens pose a significant threat to food safety.
  • Conventional antimicrobial agents often face challenges like volatility and limited efficacy.
  • Developing intelligent delivery systems is crucial for enhancing antimicrobial activity.

Purpose of the Study:

  • To create a Pickering emulsion based on OSA-starch as an intelligent delivery system for thymol.
  • To evaluate the stability and characteristics of the developed emulsion.
  • To assess the enhanced antimicrobial efficacy of thymol delivered via the Pickering emulsion against foodborne pathogens.

Main Methods:

  • Fabrication of Pickering emulsion using OSA-starch and oil.
  • Characterization of emulsion morphology, microstructure, and stability (particle size, Zeta potential).
  • Assessment of antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Aspergillus flavus through bactericidal assays and ROS induction analysis.

Main Results:

  • A stable O/W Pickering emulsion was successfully developed with specific particle size and Zeta potential.
  • The emulsion exhibited excellent stability under various conditions including low pH and high salt concentrations.
  • The Pickering emulsion significantly enhanced thymol's bactericidal effects by inducing ROS, lipid peroxidation, and cell shrinkage, showing 75% efficacy over 9 days compared to 20% for thymol alone.

Conclusions:

  • OSA-starch based Pickering emulsion serves as an effective intelligent delivery system for thymol.
  • This delivery system enhances thymol's stability and antimicrobial efficacy against key foodborne pathogens.
  • The findings offer a promising strategy for developing advanced food preservation solutions.